<template>
  <div>
      <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品列表</el-breadcrumb-item>
        </el-breadcrumb>

         <!-- 卡片视图 -->
        <el-card>
            <el-row :gutter="20">
                <el-col :span="8">
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
                        <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="goAddpage">添加商品</el-button>
                </el-col>
            </el-row>

            <!-- 用户列表区域 -->
            <el-table :data="goodslist" border stripe>
                    <el-table-column type="index" label="#"></el-table-column>
                    <el-table-column label="商品名称" prop="goods_name"></el-table-column>
                    <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
                    <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
                    <el-table-column label="创建时间" prop="add_time" width="140px">
                        <template v-slot="scope">
                            {{scope.row.add_time | dateFormat}}
                            <!-- {{scope.row.add_time | timeFormater }} -->
                        </template>
                    </el-table-column>
                    <el-table-column label="操作" width="130px">
                        <template v-slot="scope">
                            <!-- 修改按钮 -->
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.goods_id)"></el-button>
                            <!-- 删除按钮 -->
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.goods_id)"></el-button>
                        </template>
                    </el-table-column>
            </el-table>

            <!-- 分页区域 -->
            <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum"
                :page-sizes="[5, 10, 25, 50]"
                :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total" background>
            </el-pagination>

            <!-- 修改商品信息的对话框 -->
            <el-dialog
                title="修改商品"
                :visible.sync="editDialogVisible"
                width="50%"
                @close='editDialogClosed'>
                <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="editForm.goods_name" ></el-input>
                    </el-form-item>
                    <el-form-item label="价格" prop="goods_price">
                        <el-input v-model="editForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="数量" prop="goods_number">
                        <el-input v-model="editForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="重量" prop="goods_weight">
                        <el-input v-model="editForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                </el-form>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="editDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="editGoodsInfo">确 定</el-button>
                </span>
            </el-dialog>

        </el-card>

  </div>
</template>

<script>
export default {
  name: 'List',
  data() {
    return {
      // 获取用户列表的参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      goodslist: [],
      total: 0,
      // 修改商品对话框
      editDialogVisible: false,
      editForm: {},
      // 修改商品的验证规则对象
      editFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('请求商品列表失败！')
      }
      this.goodslist = res.data.goods
      this.total = res.data.total
      // console.log(this.goodslist);
    },
    // 监听 pagesize 改变的事件
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 监听 页码值 改变的事件
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    goAddpage() {
      this.$router.push('/goods/add')
    },
    // 修改商品对话框关闭后
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 查询商品信息
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询商品信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editGoodsInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('goods/' + this.editForm.goods_id, this.editForm)
        if (res.meta.status !== 200) return this.$message.error('修改商品信息失败')
        this.$message.success('修改商品信息成功！')
        // 隐藏添加用户的对话框
        this.editDialogVisible = false
        // 重新获取用户列表数据
        this.getGoodsList()
      })
    },

    async removeUserById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult);
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除商品失败！')
      }

      this.$message.success('删除商品成功！')
      this.getGoodsList()
    }
  }

}
</script>

<style>

</style>
